| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] necessary for that [noun] | 9 |
|
| 2 | [be] necessary for that [noun sg] | 9 |
|
| 3 | [be] necessary for that purpose | 6 |
|
| 4 | [be] necessary for that purpose | 6 |
|
